High-Entropy Metal-Organic Frameworks for Highly Reversible Sodium Storage.

ABSTRACT: Prussian blue analogues (PBAs) are reported to be efficient sodium storage materials because of the unique advantages of their metal-organic framework structure. However, the issues of low specific capacity and poor reversibility, caused by phase transitions during charge/discharge cycling, have thus far limited the applicability of these materials. Herein, a new approach is presented to substantially improve the electrochemical properties of PBAs by introducing high entropy into the crystal structure. To achieve this, five different metal species are introduced, sharing the same nitrogen-coordinated site, thereby increasing the configurational entropy of the system beyond 1.5R. By careful selection of the elements, high-entropy PBA (HE-PBA) presents a quasi-zero-strain reaction mechanism,

SUBMITTER: Ma Y 

PROVIDER: S-EPMC11469271 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature